I don't think it's necessarily NIMBY or at least my understanding of it that makes people want to keep housing prices elevated. If I buy a house at an inflated price, I want the house value to continue to rise as a large degree of my financial security is tied up in that house. My ability to refinance, take cash out and eventually even sell that house are tied to it continuing to escalate in value. In the US this is particularly true as so much of out net worth is essentially our home value. As inflation increases and peoples ability to save is even further reduced this will become even more of an issue.